expat: 2.2.0 -> 2.2.1

Includes fixes for CVE-2017-9233 and CVE-2016-9063.

pkgs/development/libraries/expat/default.nix

@@ -1,11 +1,11 @@
 { stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
-  name = "expat-2.2.0";
+  name = "expat-2.2.1";
 
   src = fetchurl {
     url = "mirror://sourceforge/expat/${name}.tar.bz2";
-    sha256 = "1zq4lnwjlw8s9mmachwfvfjf2x3lk24jm41746ykhdcvs7r0zrfr";
+    sha256 = "11c8jy1wvllvlk7xdc5cm8hdhg0hvs8j0aqy6s702an8wkdcls0q";
   };
 
   outputs = [ "out" "dev" ]; # TODO: fix referrers
@@ -17,6 +17,8 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
 
+  preCheck = "patchShebangs ./run.sh";
+
   meta = with stdenv.lib; {
     homepage = http://www.libexpat.org/;
     description = "A stream-oriented XML parser library written in C";